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Saima wants to put a lace on the edge of a circular table cover of diameter 1.5 m. Find the length of the lace required and also find its cost if one meter of the lace costs Rs.15.

Q. 6.     Saima wants to put a lace on the edge of a circular table cover of diameter 1.5 \; m. Find the length of the lace required and also find its cost if one meter of the lace costsRs.15. (Take \pi =3.14)

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It is given that diameter of a circular table is 1.5m.

We know that

Circumference of circle is = 2\pi r

\Rightarrow 2 \times \frac{22}{7}\times \frac{1.5}{2} = 4.71 \ m

Now, length of the lace required is 

\Rightarrow  circumference of circle = 4.71 \ m

Now,  cost of lace at Rs.15 \; per \; meter is 

\Rightarrow 4.71 \times 15 = 70.65 \ Rs

Therefore, length of the lace required is  4.71 m and   cost of lace at  Rs.15 \; per \; meter  is  Rs 70.65 

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